The black thing on the back is for where it mates with a printer or cassette interface, its just a alignment tab to hold calc in place. I got the fx-720p with ram card.
Dave "I didn't RTFM" Jones strikes again :-) I once had a (casio) PB700, is that older or newer than this one? It had a expansion port and RAM cartridges.
Thanks. Also ran this in my Amsrad CPC 646 only with *2. The little CASIO can count to far higher numbers which I found intresting. 10 C=2 20 C=C*2 30 PRINT C;: PRINT 40 GOTO 20 With the Amsrad youdon't need ;: PRINT but you probaly knew that anyway.
My first computer was a FX 720p (like this but smaller display), sold it long ago when I was a kid. I recently bought one off ebay that wasn't working thinking it would be fun to try and fix, turned out they'd managed to shove the memory card in BACKWARDS and that was the only reason it didn't work, flipped it over and works fine!
This brings back memories... My dad had MK-85, USSR equivalent to the FX-700P. It was almost identical visually and had somewhat similar BASIC capabilities, but was completely different inside, to the point that is had a 16-bit CPU (while at the same time being slower than FX-700P), and lacked any expansion.
YES I have it too it is still running, but design was much more worse, it hase 4 batteries 1.5V and it works like only few months on it ;-), The biggest difference was that it could plot on the display some dots like a graphic calculator. I also have casio fx-720P and fx730P like the one in the movie.
I've finally learnt how to do something with this calculator because of this video, had one for a few years now and have only ever used it as a basic calculator.
I just got one in mint condition off eBay. It's a very nice pocket computer with many scientific functions easily accessible. This makes it quite nice for day-to-day use, and having BASIC programming is quite a powerful little machine.
I've just stumbled across this video in search of programs for my Casio FX-730p that I purchased back in 1988. I also have a Casio PB-1000 Personal Computer that I bought 2nd hand in 1990.
I wish, I still had mine. I broke it in the mid 1990s and have never found a calculator, that I liked as much. It was simple to use, nearly no learning required. I really liked the formula entry and calculation feature, which was very helpful at university.
This clip in the middle of the FX-750 is for holding the calculator in place, when you use the FP-12S Printer with the table. You have to put the calculator on the table and then to the printer, who has a rendell-screw to tighten the whole thing.
I bougth an 750P back in 1985 during my apprenticeship. Added two 4k RAM expansion cards. (It could hold two cards at the same time.) Moved over to a 850P in 1988. After 30 years it still serves as my daily calculator at work. I wrote some helpful little basic programs, still using one occasionally. The scientific and basic (blue, red) labels on the keyboard are bleached out. And pressing the BRK key often turns the calculator off. Gentle pushing right of the power switch against the case brings the FX-850 back to life. I wonder if any of the smartphones sold today will still work in 30 years. By the way, I have a collection of about 40 different CASIO (or TRS rebranded) basic programmable pocket computers. All in working condition!
I stilll have mine its like 35 years old still works I also have the two books that came with it. Got it from Service merchadise. Used it for engineering classes and wrote some programs to make work easier.
I have the FX-720P with 2kb SRAM (1568 bytes available after reset), and I had it overclocked back in the 80’s with a potentiometer replacing the resistor of its R/C that it was using for clock. I made it run from its initial 200kHz up to about 1MHz, although it needed to also be overvoltaged to 8V from the initial 6V of the 2x CR2032. I did it just as a proof of concept, not because it served some purpose to overclock it, but it was fun, and I still have it to this date in working condition! The 8V regulator (78L08) and the potentiometer are still embedded in the case. The regulator on the slim side next to the RAM cap, and the potentiometer was fitted on the mounting hole for the printer, on the back side. I’ve opened a tiny hole next to the expansion connector for the barrel plug of the external power, for when I’d wanted it to run overclocked.
And nowadays graphical calculators have about the same processing power as this 1980s computer and still cost a fortune (and they make them for just $15). Why? Because they can as they're mandatory in schools and universities.
Oh my. We used those 730Ps in my apprenticeship in 1990-1992. We ordered a full set of those in 1990 for the students of our class back then...so definetly they were available in 1990 in Germany. And I still have mine!
I still use a Casio fx-450 calculator, a truely pocket size solar powered calculator that does decimal, hex, octal and binary. Also does some logic functions (and, or, xor not, xnor) plus trig, polar/rectangular, DMS, and even fractions. There are also some built-in constants like speed of light!
the 450 was my first REAL calculator. I loved it. I eventually wore mine out and I still miss it though I have "better" calculators today it remains a favorite.
Whoa. Memories. I still have mine somewhere around. We used this in our math class and it was allowed during graduation finals. Basic was limited, and there was no system level access whatsoever, but you still could achieve some fine results. I programmed a numerical analysis program for finding roots and extrema for polynoms. Was fun
10 c=c+1 20 print c 30 goto 10 I expect undefined behavior since *c* wasn't defined to be 0. I assume, typically compilers will initialize variables to 0 then.
If the program was used by another one in another section then the C variable may have been not set to 0. In this case, it would have been ok to enter 5 CLEAR. but as well change 20 like 20 PRINT C; to get a non stopped execution. But all numbers would have been dislayed on the same line then scrowling on the left. To get the proper counter, the line 20 should have been 20 PRINT CSR0; C; and then the numbers would have been incremented at position 0 without break. Each time the machine is turned on and the program is executed, the number count would have continued from the last break. To start from 0, the command 5 CLEAR or 5 C=0 would have been necessary.
I had a Tandy version of one of these. Don't remember the model. It was in a clamshell black metal case. Loved it used the hell out of it in my analog & digital electronics classes; math classes too. I even used it grocery shopping. I had all the programing slots filled with cool stuff I made.one of the coolest programs I made was a binary/decimal & vice versa converter. Did one for hexadecimal too. Made a proof to help me fit music titles from LP to cassette, & lots more. I eventually wore it out & dropped it too many times. Was heartbroken when it stopped working. I felt lost. I had become so reliant on it. Never being a able to backup all my work. Nothing available to replace it. I truly did not know what I was going to do for quite some time. Ironically, having a smart phone is the closest I've ever come to a replacement product.
that calculator is very easy to use. if you press the letter "S" (with the red color) its means its all for the red function and "F" for all the blue functions. its design to make simple programs specially for counting or determining coordinates depends on your program if your a Civil Engineer of so. in the year 1980 - 1990.
Nice video I just saw today (3 years after you published it). BTW, you can execute any program recorded in the 10 sections by typing MODE 0 and then SHIFT n (the number of the section (0 to 9). No need to enter RUN. Each program in the different sections can be called by each others using command GOSUB #n with n the number of the section. Interesting to imagine at that time to prepare programs witht the MAIN in 0 and then calling sub ones in different sections. No way to pass parameters but variables were global. So a section may perform a calculation with a variable used in another section. Variables were not isolated.
6:00 + ... Actually the Hitachi's are not merely display drivers... These are actually 'DUAL' 8 bit HD61700 series CPUs that have 16bit internal data busses - The 730p is not too dissimilar to the folding 790p. The Second CPU manages the scientific functions of the machine & half of the display, shifted keys etc. Whilst the First CPU manages the 'computer' aspect; BASIC interpreter, runtime environment, the other half of the screen, unshifted keys & so on. The other 3 chips are a 440 gate logic array, 8k ram, & a quad 'OR' logic gate.
I used to own a Tandy PC6 which is a rebadged Casio FX790 and had the memory expansion to 16 KB and tape interface and recorder, this video brings back great memories for me, I now own a sharp PC 1246 and a PC-E500S pocket computers.
The I/O connector was used to attach to a tape deck for program backup, printer, and... modem. Someone actually made a modem for those things. Still using the Tandy PC-3. Similar to your Casio (but more cheaply made).
Yes, i build an interface to store my programs to tape for a sharp pc-1403H. I guess it is a successor of the fx730. It worked fine until the i guess i blew the port of the calculator...
The little springs on the back remind me of the spring in the HP 12C/15C type calculators. They to had ground connecting springs. Wonder if they stole the idea from HP. I'm going to be uploading a video on picking a good calculator for basic electronics. Going to cover everything from super basic calculators to the premium ones like the HP Prime. I have about 820 calculators in my collection and think I may start doing videos on them from time to time. Seems to be a increasing interest in vintage calculators.
Springs more for ESD protection than EMI, as those low power processors could easily get corrupted memory if you used them as a discharge path from your charged body to a desk. Casio used the IO connector as a way to connect a printer and a cassette desk, so you could print ( using a small 4 colour pen plotter, with exquisitely expensive little pens that wrote 150m or so before they ran out of ink, or a small thermal printer later that was slightly better) and save your programs to tape. Tape interface also allowed the calculator ( and a big basic program you typed in) to play music as well, single note at a time, and somewhat limited, but big in 1980.
I still own this calculator with the original leather case and german manual and 16k of memory. It works fine, even with the 15 years ago programmed "horse race", which is one part in the manual. Great video!
I had a FX-880p which I built a pc interface for myself and upgraded it with additional 32k Memory (could be 64, not sure) Bought it in the early 90's when I was still going to school. I would carry it around everywhere in my pocket. Was the ubernerd of the school. Auctioned it off somewhere around 2008 for almost the same price I had bought it.
Not quite that model, but I still occasionally use a PC-1403H. The periphery connector looks almost identical. The 1403 had a cassette interface in there for "load" and "save" commands, maybe this one has too? I also managed to score a printer for it on ebay recently.
Looks like that to me. The ends of those springs are captured in the plastic and not electrically connected to the PCB so I can't see how they would act as conductors for EMI.
You can print "continuous" by simply adding a semicolon. For example 20 PRINT CSR0;C; would have shown you a continuous changing number. CSR0; is needed to make sure you keep printing at the start of the line. Also there is no need to add spaces when you code, the 730P will add them automatically, so you can simply type 20PRINTCSR0;C; and the spaces will appear automatically. With a bit of practice you can really type programs very quickly. I really like this pocket computer, but miss some functions like complex numbers, vectors and matrices.
I still have my Tandy branded version and its four color pen printer/plotter. In the mid 80s I did useful engineering tasks at work with it. I also still have my HP 21 and its accompanying "ENTER > =" T shirt. Yes, I hold on to some things.
Hyperbolic functions are because with one key you can get six new functions. I had Casio FX-702P from 1981 it was probably the first such Casio. I liked the way it was used to do calculations but unlike modern calculators you could not go back to the calculation after pressing the exe. If you made a mistake you had to do it all again.
I had the more commonly sold CASIO fx-720p, enjoyed writing a few simple programs when it came to repeated calculations during my studies. It had only a 12 character display, so I was annoyed when the larger display version came out soon after. The port on the back is for the printer and/or cassette interface, the tab underneath is to align and grip these units more securely. To save programs I used the RAM cards, which were expensive but I figured it was easier to swap out on the fly (powered off) than loading and saving via tape. There was a latched door on the bottom to access these instead of needing to unscrew the case. I found my CASIO fx-3400 programmable calculator better for everyday use, and still have that today. For pocket computing, I soon got a Psion mx-5, which could connect via my Nokia 3210 to GSM data and get my email, diary, etc. How quickly things moved on!
I'm a confirmed pocket computer tragic, I suspect. Started with the Sharp PC1211 back when I was in school, later replaced with a PC1246, followed by the PC1350 with the 4-line display and pixel-addressable graphics. These days in my desk drawer at work I have a PC1350 (with the 16k static RAM card), a PC1403H, and an EL5100 (not BASIC programmable, but a pretty impressive calculator for 1979) - they see regular, if not daily usage when I need a calculator - and they make me smile.
I recently got lucky and found this computer at a flea market for a measly BUCK. Seller didn't know what he was selling, and I had no idea what exactly I was buying, just knew that I wanted it.
Man soldering those diodes would have been a pain, surprised they didn't just use a melf package. Also cool reset switch, just a bit of metal soldered to PCB
Dave. i have a energizer battery from 1990 that still works. and has not leaked. its has mercury in it(does not have the tree on the label). Energizer bunny keeps going and going! no need for batteriser...
There was an adapter to save the programs to a normal audio cassette and load them from there. I had this thing (or a predecessor with less RAM) in my school days...
I had a couple of Sharp programmable calculators like that. If you want them I'll see if I can dig them out? My brother wrote hangman and a few games that ran on it.
Made to be a competitor to the Hewlett Packard's HP-71B it looks like? I've been looking for the HP for years, but *damn* those things are ridiculously sought after!
I imagine BASIC with some nice UI would make a great smartphone app. Sometimes I use DOSBox+QBASIC as a calculator even today on my PC. It was just great for stuff too complicated for a calculator but too simple to use C or something like that.
You can try QB64 on a PC or with an android smarthphone try Frodo C64 or TRS-80 for old BASIC programming, do you like python? there is Qpython 3 also for android.
Hello, I dont know if it was really the same but i made a lot of game with ! in 1992 with poke and peak -16880 and coordonate you was able to create your own characters it was so powerfull to creat game in Basic like in my Apple IIe !!! is good to remember this.Thanks
Is this the predecessor off the FX-740p? I had one borrowed and it was pretty fun, had a RS232 I/O on the expansion port, one more line and more memory. I think the beep was disabled by default... Great stuff. Also the Ti Galaxy and HP programmable calculators were very fun to program.
Hi Dave, I have a crusty old HP calculator that uses RPN. It's been in the family for long, and I'd love to see it working again. Maybe I'll send it to the mailbag and you'll fix it for me.
It's not in the gate array. This array has 440 gates, the smallest one they made at the time, so good luck implementing a processor in that! Allegedly it's in one of the LCD drivers.
got a similar one , a damaged SHARP PC 1403H got it long time ago as gift, soem butons missing :( Never had the time to play around.. i collect some stuff for a mailbag, will put it by ;)
Nice find mate! this kinda looks like a TRS-80 pocket computer clone. which i still have my TRS80 pocket computer and works like new. i removed the battery 4-5 yrs after i bought it so it didnt rot while stored.
Thanks, I did not know that. I just did a quick searched on them. Some early models were Sharp, and others were Casio. Mines a PC-4 so that makes it a Casio PB-100 re-branded. I do remember it wasnt anywhere near as powerful as the TRS-80 desktops. So i guess these were just fancy calculators with 1K RAM and 12K ROM. lol They did run most basic programming though which was pretty easy to learn.
james corvett Dave said "it was only made a couple of years", but I seem to remember CASIO had a small range of 'calculators' in the 'pocket computer' style for several years. Must have sold enough for them to keep making them.
I tried to place it straight in my mind and at 45° and couldn't route it, so yeah they probably ran out of space just like me in my little mental routing experiment.
According to the datasheet the processor is a gate array with 440 gates. I'm wondering how they can make a processor with such a low number of gates. It must have a very simple instruction set.
I had this throughout my secondary school and wrote hundreds of games for it🤯(I went on to be a professional game developer...)
The black thing on the back is for where it mates with a printer or cassette interface, its just a alignment tab to hold calc in place. I got the fx-720p with ram card.
10 c=c+1
20 print c;: print
30 goto 10
This will allow the program to run without hitting the EXE button for each step
Ah, I knew there would be a way to do it, I didn't read the manual.
Dave "I didn't RTFM" Jones strikes again :-) I once had a (casio) PB700, is that older or newer than this one? It had a expansion port and RAM cartridges.
Starting to use c without giving it a defined initial value still kind of ticks me off!
There is also programming mode - TRACE ON, TRACE OFF. If you do TRACE OFF - you'll get the same.
Thanks. Also ran this in my Amsrad CPC 646 only with *2. The little CASIO can count to far higher numbers which I found intresting.
10 C=2
20 C=C*2
30 PRINT C;: PRINT
40 GOTO 20
With the Amsrad youdon't need ;: PRINT but you probaly knew that anyway.
Please do an interview with *Flynn* and how he so easily gets *in*
And another with uncle Bob !
Don't forget Murial, who's apparently terrible at everything.
And i want to know what else she wrote!
What about this duck that's spilling its guts everywhere?
Errol Flynn is long since dead & the saying comes about because of his success with women.
My first computer was a FX 720p (like this but smaller display), sold it long ago when I was a kid. I recently bought one off ebay that wasn't working thinking it would be fun to try and fix, turned out they'd managed to shove the memory card in BACKWARDS and that was the only reason it didn't work, flipped it over and works fine!
This brings back memories... My dad had MK-85, USSR equivalent to the FX-700P. It was almost identical visually and had somewhat similar BASIC capabilities, but was completely different inside, to the point that is had a 16-bit CPU (while at the same time being slower than FX-700P), and lacked any expansion.
YES I have it too it is still running, but design was much more worse, it hase 4 batteries 1.5V and it works like only few months on it ;-), The biggest difference was that it could plot on the display some dots like a graphic calculator.
I also have casio fx-720P and fx730P like the one in the movie.
The notch on the back is for having a perfect fit on the docking station with printer and casset interface
I've finally learnt how to do something with this calculator because of this video, had one for a few years now and have only ever used it as a basic calculator.
I just got one in mint condition off eBay. It's a very nice pocket computer with many scientific functions easily accessible. This makes it quite nice for day-to-day use, and having BASIC programming is quite a powerful little machine.
7:04 That's actually a Fujitsu IC. Fairchild's logo doesn't have the lines on the top and bottom.
Wow. 4k clarity! This looks great on my 43" 4k TV. Thanks for another great video along with the camera upgrade.
I've just stumbled across this video in search of programs for my Casio FX-730p that I purchased back in 1988. I also have a Casio PB-1000 Personal Computer that I bought 2nd hand in 1990.
I wish, I still had mine. I broke it in the mid 1990s and have never found a calculator, that I liked as much. It was simple to use, nearly no learning required. I really liked the formula entry and calculation feature, which was very helpful at university.
This clip in the middle of the FX-750 is for holding the calculator in place, when you use the FP-12S Printer with the table. You have to put the calculator on the table and then to the printer, who has a rendell-screw to tighten the whole thing.
I bougth an 750P back in 1985 during my apprenticeship. Added two 4k RAM expansion cards. (It could hold two cards at the same time.) Moved over to a 850P in 1988. After 30 years it still serves as my daily calculator at work. I wrote some helpful little basic programs, still using one occasionally. The scientific and basic (blue, red) labels on the keyboard are bleached out. And pressing the BRK key often turns the calculator off. Gentle pushing right of the power switch against the case brings the FX-850 back to life. I wonder if any of the smartphones sold today will still work in 30 years. By the way, I have a collection of about 40 different CASIO (or TRS rebranded) basic programmable pocket computers. All in working condition!
I stilll have mine its like 35 years old still works I also have the two books that came with it. Got it from Service merchadise. Used it for engineering classes and wrote some programs to make work easier.
I have the FX-720P with 2kb SRAM (1568 bytes available after reset), and I had it overclocked back in the 80’s with a potentiometer replacing the resistor of its R/C that it was using for clock. I made it run from its initial 200kHz up to about 1MHz, although it needed to also be overvoltaged to 8V from the initial 6V of the 2x CR2032. I did it just as a proof of concept, not because it served some purpose to overclock it, but it was fun, and I still have it to this date in working condition! The 8V regulator (78L08) and the potentiometer are still embedded in the case. The regulator on the slim side next to the RAM cap, and the potentiometer was fitted on the mounting hole for the printer, on the back side. I’ve opened a tiny hole next to the expansion connector for the barrel plug of the external power, for when I’d wanted it to run overclocked.
And nowadays graphical calculators have about the same processing power as this 1980s computer and still cost a fortune (and they make them for just $15). Why? Because they can as they're mandatory in schools and universities.
Oh my. We used those 730Ps in my apprenticeship in 1990-1992. We ordered a full set of those in 1990 for the students of our class back then...so definetly they were available in 1990 in Germany. And I still have mine!
I still use a Casio fx-450 calculator, a truely pocket size solar powered calculator that does decimal, hex, octal and binary. Also does some logic functions (and, or, xor not, xnor) plus trig, polar/rectangular, DMS, and even fractions. There are also some built-in constants like speed of light!
the 450 was my first REAL calculator. I loved it. I eventually wore mine out and I still miss it though I have "better" calculators today it remains a favorite.
Whoa. Memories. I still have mine somewhere around. We used this in our math class and it was allowed during graduation finals. Basic was limited, and there was no system level access whatsoever, but you still could achieve some fine results. I programmed a numerical analysis program for finding roots and extrema for polynoms. Was fun
10 c=c+1
20 print c
30 goto 10
I expect undefined behavior since *c* wasn't defined
to be 0. I assume, typically compilers will initialize variables to 0 then.
Yes, every BASIC I've ever used has always initiated to zero by default.
EEVblog, okay I figured so, thank you :) Great video by the way
Some BASIC's do some don't. Some of the ones on UK micro don't and give you an error, from memory the BBC micro/Electron. But I could be wrong.
If the program was used by another one in another section then the C variable may have been not set to 0. In this case, it would have been ok to enter 5 CLEAR. but as well change 20 like 20 PRINT C; to get a non stopped execution. But all numbers would have been dislayed on the same line then scrowling on the left. To get the proper counter, the line 20 should have been 20 PRINT CSR0; C; and then the numbers would have been incremented at position 0 without break. Each time the machine is turned on and the program is executed, the number count would have continued from the last break. To start from 0, the command 5 CLEAR or 5 C=0 would have been necessary.
Good to see you got it to run a programme!
I had a Tandy version of one of these. Don't remember the model. It was in a clamshell black metal case.
Loved it used the hell out of it in my analog & digital electronics classes; math classes too. I even used it grocery shopping.
I had all the programing slots filled with cool stuff I made.one of the coolest programs I made was a binary/decimal & vice versa converter. Did one for hexadecimal too. Made a proof to help me fit music titles from LP to cassette, & lots more.
I eventually wore it out & dropped it too many times.
Was heartbroken when it stopped working. I felt lost. I had become so reliant on it. Never being a able to backup all my work. Nothing available to replace it. I truly did not know what I was going to do for quite some time.
Ironically, having a smart phone is the closest I've ever come to a replacement product.
that calculator is very easy to use. if you press the letter "S" (with the red color) its means its all for the red function and "F" for all the blue functions. its design to make simple programs specially for counting or determining coordinates depends on your program if your a Civil Engineer of so. in the year 1980 - 1990.
I'm using a Casio fx-115 on a daily basis. It is a scientific calculator, and it is high power / solar cell.
Very reliable piece of equipment.
Nice video I just saw today (3 years after you published it). BTW, you can execute any program recorded in the 10 sections by typing MODE 0 and then SHIFT n (the number of the section (0 to 9). No need to enter RUN. Each program in the different sections can be called by each others using command GOSUB #n with n the number of the section. Interesting to imagine at that time to prepare programs witht the MAIN in 0 and then calling sub ones in different sections. No way to pass parameters but variables were global. So a section may perform a calculation with a variable used in another section. Variables were not isolated.
6:00 + ... Actually the Hitachi's are not merely display drivers... These are actually 'DUAL' 8 bit HD61700 series CPUs that have 16bit internal data busses - The 730p is not too dissimilar to the folding 790p. The Second CPU manages the scientific functions of the machine & half of the display, shifted keys etc. Whilst the First CPU manages the 'computer' aspect; BASIC interpreter, runtime environment, the other half of the screen, unshifted keys & so on. The other 3 chips are a 440 gate logic array, 8k ram, & a quad 'OR' logic gate.
I used to own a Tandy PC6 which is a rebadged Casio FX790 and had the memory expansion to 16 KB and tape interface and recorder, this video brings back great memories for me, I now own a sharp PC 1246 and a PC-E500S pocket computers.
The I/O connector was used to attach to a tape deck for program backup, printer, and... modem. Someone actually made a modem for those things.
Still using the Tandy PC-3. Similar to your Casio (but more cheaply made).
the Tandy PC3 is a sharp PC 1251
Also a link cable to transfer between two FX730Ps. I think I still have one and the cable. And the manual! I’ll have to find it now.
Yes, i build an interface to store my programs to tape for a sharp pc-1403H. I guess it is a successor of the fx730. It worked fine until the i guess i blew the port of the calculator...
The little springs on the back remind me of the spring in the HP 12C/15C type calculators. They to had ground connecting springs. Wonder if they stole the idea from HP.
I'm going to be uploading a video on picking a good calculator for basic electronics. Going to cover everything from super basic calculators to the premium ones like the HP Prime.
I have about 820 calculators in my collection and think I may start doing videos on them from time to time. Seems to be a increasing interest in vintage calculators.
Those ground springs are as common as mud on all sorts of stuff like this, I doubt HP invented it.
Springs more for ESD protection than EMI, as those low power processors could easily get corrupted memory if you used them as a discharge path from your charged body to a desk. Casio used the IO connector as a way to connect a printer and a cassette desk, so you could print ( using a small 4 colour pen plotter, with exquisitely expensive little pens that wrote 150m or so before they ran out of ink, or a small thermal printer later that was slightly better) and save your programs to tape. Tape interface also allowed the calculator ( and a big basic program you typed in) to play music as well, single note at a time, and somewhat limited, but big in 1980.
EEVblog excellent video :)
But, can the Casio scientific calculator run Crysis?
@@thanthanasiszamp4707 No, for the zillionth time.
@@Crazytesseract my question was sarcastic
I still own this calculator with the original leather case and german manual and 16k of memory. It works fine, even with the 15 years ago programmed "horse race", which is one part in the manual. Great video!
I had a FX-880p which I built a pc interface for myself and upgraded it with additional 32k Memory (could be 64, not sure) Bought it in the early 90's when I was still going to school. I would carry it around everywhere in my pocket. Was the ubernerd of the school. Auctioned it off somewhere around 2008 for almost the same price I had bought it.
It seems to be powerful enough to calculate 42. Amazing!
Not quite that model, but I still occasionally use a PC-1403H. The periphery connector looks almost identical. The 1403 had a cassette interface in there for "load" and "save" commands, maybe this one has too? I also managed to score a printer for it on ebay recently.
Springs help pop off the back cover. That's my experience from having owned several Casio's of this vintage.
Looks like that to me. The ends of those springs are captured in the plastic and not electrically connected to the PCB so I can't see how they would act as conductors for EMI.
You can print "continuous" by simply adding a semicolon. For example 20 PRINT CSR0;C; would have shown you a continuous changing number. CSR0; is needed to make sure you keep printing at the start of the line. Also there is no need to add spaces when you code, the 730P will add them automatically, so you can simply type 20PRINTCSR0;C; and the spaces will appear automatically. With a bit of practice you can really type programs very quickly. I really like this pocket computer, but miss some functions like complex numbers, vectors and matrices.
I owned one of them back in the day - damm it was a great toy
Do you remember what was its original price?
The locator on the rear and the connector were for a cassette dock - I have one complete with the dock somewhere around the house!
Wow, thanks for showing this. Now i don't need to open my one from school...even its battery is still good after all these years. :D
I love vintage calculators
I still have my Tandy branded version and its four color pen printer/plotter. In the mid 80s I did useful engineering tasks at work with it. I also still have my HP 21 and its accompanying "ENTER > =" T shirt. Yes, I hold on to some things.
Hyperbolic functions are because with one key you can get six new functions. I had Casio FX-702P from 1981 it was probably the first such Casio. I liked the way it was used to do calculations but unlike modern calculators you could not go back to the calculation after pressing the exe. If you made a mistake you had to do it all again.
I had the more commonly sold CASIO fx-720p, enjoyed writing a few simple programs when it came to repeated calculations during my studies.
It had only a 12 character display, so I was annoyed when the larger display version came out soon after.
The port on the back is for the printer and/or cassette interface, the tab underneath is to align and grip these units more securely.
To save programs I used the RAM cards, which were expensive but I figured it was easier to swap out on the fly (powered off) than loading and saving via tape. There was a latched door on the bottom to access these instead of needing to unscrew the case.
I found my CASIO fx-3400 programmable calculator better for everyday use, and still have that today.
For pocket computing, I soon got a Psion mx-5, which could connect via my Nokia 3210 to GSM data and get my email, diary, etc. How quickly things moved on!
I had a 720p too. I remember spending ages typing in some of the example programmes from the manual.
I always wanted one of these when I was a kid.
I WISH SHE HAD WRITTEN SO MUCH MORE
I still use my FX-790P... :)
Me too! I have two of them ;-)
I'm a confirmed pocket computer tragic, I suspect. Started with the Sharp PC1211 back when I was in school, later replaced with a PC1246, followed by the PC1350 with the 4-line display and pixel-addressable graphics. These days in my desk drawer at work I have a PC1350 (with the 16k static RAM card), a PC1403H, and an EL5100 (not BASIC programmable, but a pretty impressive calculator for 1979) - they see regular, if not daily usage when I need a calculator - and they make me smile.
I recently got lucky and found this computer at a flea market for a measly BUCK. Seller didn't know what he was selling, and I had no idea what exactly I was buying, just knew that I wanted it.
I like how you ended your basic program on "42". Well played. Well played. :)
Man soldering those diodes would have been a pain, surprised they didn't just use a melf package. Also cool reset switch, just a bit of metal soldered to PCB
Still using the FX-730P that I bought new in 1990. 😊
Dave. i have a energizer battery from 1990 that still works. and has not leaked. its has mercury in it(does not have the tree on the label). Energizer bunny keeps going and going! no need for batteriser...
I like the surface mounted through-hole capacitor.
7:09 - Someones installed that chip on the wonk. Shoddy workmanship. You wanna get the pliers on that and straighten it out. No wukkas.
STILL HAVE MY FX880 ...STORED ALL MY EXAM STUFF ...HO HO HOOO
THE FX880 HAD A 8 BIT IO PORT....THAT WAS FUN
Yep i have one love vintage stuff.
Someday i owned Casio FX 770P it was folding like pocket, unfortunately it's damaged
I hope someone of your subscribers send you that model to review
@13:00 The answer is 42 :D
HGTTG :)
I learned to code on a Casio FX-880P , ohh good times!!
There was an adapter to save the programs to a normal audio cassette and load them from there. I had this thing (or a predecessor with less RAM) in my school days...
I had a couple of Sharp programmable calculators like that. If you want them I'll see if I can dig them out? My brother wrote hangman and a few games that ran on it.
8k ram was simply a standard 6264LP3 ram chip that was on a PCB, with the zebra stripe connectors connecting pin to pin there on a small PCB.
I had a radio shack TRS-80 PC-4 which was a casio PB-100... same years and same basic.
Nice calculator
they almost like alien made. you never hear someone come forward saying "i designed this thing"
Made to be a competitor to the Hewlett Packard's HP-71B it looks like? I've been looking for the HP for years, but *damn* those things are ridiculously sought after!
I have a few HP-71B's - a bit chunkier that the Casio, but with much better keys & HP-IL interface
I imagine BASIC with some nice UI would make a great smartphone app. Sometimes I use DOSBox+QBASIC as a calculator even today on my PC. It was just great for stuff too complicated for a calculator but too simple to use C or something like that.
I used to have a small early 90ies laptop with QBASIC for that; but now i just run Python.
You can try QB64 on a PC or with an android smarthphone try Frodo C64 or TRS-80 for old BASIC programming, do you like python? there is Qpython 3 also for android.
I don't like Python.
It's OK, you don't have to eat it.
Hello, I dont know if it was really the same but i made a lot of game with ! in 1992 with poke and peak -16880 and coordonate you was able to create your own characters it was so powerfull to creat game in Basic like in my Apple IIe !!! is good to remember this.Thanks
i remember Casio PB 100 really similar to the FX730P
Cool i had a friend with calculator with basic that i could use but i am not smart enough to get past the hello world stage.
Still have my HP15C from 1983. I think Allen from w2aew also has one, saw one lying around there...
Is this the predecessor off the FX-740p? I had one borrowed and it was pretty fun, had a RS232 I/O on the expansion port, one more line and more memory. I think the beep was disabled by default... Great stuff. Also the Ti Galaxy and HP programmable calculators were very fun to program.
And that's why I became a programmer, I used to play with electronics too.
Now you do have a proper calc!
That ressemble a TRS-80 PC-4, the tab under was for the dock, printer or cassette interface...
Hi Dave, I have a crusty old HP calculator that uses RPN. It's been in the family for long, and I'd love to see it working again. Maybe I'll send it to the mailbag and you'll fix it for me.
I just bought one second hand, maybe I make a couple of videos with it.
My dreams of doing a simple demo on something like this were just dashed by that bloody print "feature"
You should do print -> for loop delay -> clear than goto 10
Still use mine for marine navigational calculations. 😊
A nice Kiwi present :)
See if it powers down when the back is removed (springs)
It works without the back cover on.
Why Casio don’t make and sell this sort of calculator ? I start to learn programming from FX-880P.
Sharp Pocket Computers, PC1500 and PCE-500 were so much better. The PC-1600 was cool, but rare.
This F with serifs and stripes is actually Fujitsu semiconductor, not Fairchild.
Normally you can enter something like WAIT 0 into your program with these thingys.
that is sharp models only
Can we have some more HP calculator/RPN masterrace jokes in the comments
Typing a program on a one line display must have been incredibly frustrating, I already find using my "modern" calculator incredibly bad to use.
Not really surprising that they implemented the frontend processor in a gate array.
Makes sense I guess.
It's not in the gate array. This array has 440 gates, the smallest one they made at the time, so good luck implementing a processor in that!
Allegedly it's in one of the LCD drivers.
got a similar one , a damaged SHARP PC 1403H got it long time ago as gift, soem butons missing :( Never had the time to play around.. i collect some stuff for a mailbag, will put it by ;)
Radio Shack, used those, but rebranded.
I've always assumed such springs are for ESD.
Nice find mate! this kinda looks like a TRS-80 pocket computer clone. which i still have my TRS80 pocket computer and works like new. i removed the battery 4-5 yrs after i bought it so it didnt rot while stored.
All the TRS-80 pocket computers were re-badged Casios
The TRS-80 was a rebadged fx-700P.
Thanks, I did not know that. I just did a quick searched on them. Some early models were Sharp, and others were Casio. Mines a PC-4 so that makes it a Casio PB-100 re-branded. I do remember it wasnt anywhere near as powerful as the TRS-80 desktops. So i guess these were just fancy calculators with 1K RAM and 12K ROM. lol They did run most basic programming though which was pretty easy to learn.
well I am glad he took this one apart , so i dont have to take mine apart. =) Anyone know how many of these were made ?
james corvett Dave said "it was only made a couple of years", but I seem to remember CASIO had a small range of 'calculators' in the 'pocket computer' style for several years. Must have sold enough for them to keep making them.
Those could store programs to a cassette.
How come the LCD is so clear and no dirt.
Mine looks horrible
because it is "new old stock". It has never been used.
What's the POKE-range for the display? could allow you to bypass the auto-pause of PRINT
Hi Dave. You didn't comment on why that chip was placed at such a strange angle? Why is that did they run out of space ?
I tried to place it straight in my mind and at 45° and couldn't route it, so yeah they probably ran out of space just like me in my little mental routing experiment.
Hey Dave, do you know how to convert decimal numbers to binary on a Casio FX-730P?
According to the datasheet the processor is a gate array with 440 gates. I'm wondering how they can make a processor with such a low number of gates. It must have a very simple instruction set.
Anyone else surprised that Pom actually has a face?
Siana Gearz - I have shown my face in my videos before, it is just not that often when it is appropriate for what I’m recording.